<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <ul v-for="(item) in list">
            <li>{{item}}</li>
        </ul>
        <button @click="fn">走一走</button>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.16/dist/vue.js"></script>
    <script>
        const app = new Vue({
            el:'#app',
            data:{
                list:['帅哥','美女','程序猿']
            },
            methods:{
                fn(){
                    this.list = [this.list[1],this.list[2],this.list[0]]
                }
            }
            
        })
    </script>
</body>
</html>